International Harvester 1066

International Harvester 1066 Row-Crop tractor Technical Specifications

International Harvester 1066 is a Row-Crop tractor that was produced by the John Deere between 1971 – 1976.

Below you will find detailed technical specifications for International Harvester 1066 covering engine types, horsepower ratings, weight, height, fuel type and tank volume, oil capacity and type, hydraulic system diagram, wiring diagram, battery specs, etc.

International Harvester 1066 Production

Manufacturer International Harvester
Row-Crop tractor
Built in Rock Island, Illinois, USA
Total built 54,947
Original price was $21,100 in 1976
The hydrostatic drive 1066 Hydro was later renamed the Hydro 100. This was due to confusion over drawbar horsepower. The hydrostatic drive took a lot of power to operate, and the 1066 Hydro had much less power than a gear-driven 1066. Torque Amplifer (TA) was optional. The 1066 engine was altered in 1973 to increase horsepower.

International Harvester 1066 Power

Engine: 105.95 hp
79.0 kW
PTO (tested) 125.68 hp
93.7 kW

International Harvester 1066 Mechanical

Two- or four-wheel drive
Power steering
Hydraulic dry disc brakes
Open operator station. Two-post fixed ROPS available. Cab available with optional air-conditioning.


Type open center
Pump flow 12 gpm
45.4 lpm
Total flow 21 gpm
79.5 lpm
Steering flow 9 gpm
34.1 lpm

Tracktor Hitch

Rear Type III/II
Rear lift (at 24″/610mm) 5600 lbs
2540 kg

Power Take-off (PTO)

Rear PTO independent
Rear RPM 540/1000

Title serial numbers

1971 7101
1972 12677
1973 24205
1974 34949
1975 46855
1976 56672

FAQ: How to read a serial number table.

What year is my International Harvester 1066? Serial Number Decoder

The serial number list shows the first tractor built in each year. The other tractors for that year will have successively higher numbers. Your serial number should be between two of the stated numbers.

The list only includes the numbers of the first tractors produced in each year. Your serial should be somewhere between two numbers.Unless you happen to be the first person to own a tractor, your number will not appear on the list.

International Harvester 1066 Engine detail

Engine Detail
International Harvester DT414
turbocharged diesel
Displacement 414 ci
6.8 L
Bore/Stroke 4.30×4.75 inches
109 x 121 mm
Air cleaner dual stage dry
Rated RPM 2400
  2600 (after 1973)
Starter volts 12
Oil capacity 18 qts
17.0 L
Coolant capacity 25 qts
23.7 L

International Harvester 1066 Transmission overview

Engine Oil

Type gear
Gears 8 forward and 4 reverse
Clutch dry disc

International Harvester 1066 Dimensions

Wheelbase 105 inches
266 cm
Length 165 inches
419 cm
Width 98 inches
248 cm
Height (exhaust) 11 inches
27 cm
Clearance (drawbar) 16 inches
40 cm
Bar rear axle 3.25 inch diameter
82 mm

International Harvester 1066 Weight
Operating 12,148 lbs (gear)
5510 kg
  12,320 lbs (hydro)
5588 kg
  13,345 lbs (duals)
6053 kg
Ballasted 15,260 lbs
6921 kg

International Harvester 1066 Tests

Tractor Tests

NTTL 1081: diesel Torque Amplifier 2WD

NTTL 1083: diesel hydrostatic 2WD

NTTL 1124: diesel gear 2WD

Nebraska Tractor Test 1081

Nebraska Tractor Test 1081
Diesel Torque Amplifier 2WD
October 1 – 21, 1971
Link: Nebraska Tractor Test 1081 file
PTO performance
Power at rated engine speed 116.23 hp
86.7 kW
Fuel use 7.7 gal/hour
29.1 l/hour
Power at rated PTO speed 112.18 hp
83.7 kW
Fuel use 6.8 gal/hour
25.7 l/hour
Drawbar performance
Max power 100.5 hp
74.9 kW
Fuel use 7.6 gal/hour
28.8 l/hour
Gear 1-Hi-TA used for power test.
Max pull 11,625 lbs
5273 kg
Gear 3-Lo-TA used for pull test.

Nebraska Tractor Test 1083

Nebraska Tractor Test 1083
Diesel hydrostatic 2WD
October 7 – 25, 1971
Link: Nebraska Tractor Test 1083 file
PTO performance
Power at rated engine speed 113.58 hp
84.7 kW
Fuel use 7.9 gal/hour
29.9 l/hour
Power at rated PTO speed 109.32 hp
81.5 kW
Fuel use 7.0 gal/hour
26.5 l/hour
Drawbar performance
Max power 84.88 hp
63.3 kW
Fuel use 8.0 gal/hour
30.3 l/hour
Gear 5.4 MPH used for power test.
Max pull 9,576 lbs
4343 kg
Gear 3.1 MPH used for pull test.

Nebraska Tractor Test 1124

Nebraska Tractor Test 1124
Diesel gear 2WD
April 17 – 27, 1973
Link: Nebraska Tractor Test 1124 file
PTO performance
Power at rated engine speed 125.68 hp
93.7 kW
Fuel use 8.4 gal/hour
31.8 l/hour
Power at rated PTO speed 119.2 hp
88.9 kW
Fuel use 7.3 gal/hour
27.6 l/hour
Drawbar performance
Max power 105.95 hp
79.0 kW
Fuel use 8.3 gal/hour
31.4 l/hour
Gear 1-Hi-TA used for power test.
Max pull 13,000 lbs
5896 kg
Gear 2-Lo-Direct used for pull test.


Is International Harvester 1066 a good tractor?

The International Harvester 1066 is one of the great tractors in the International Harvester stable, and it has earned International Harvester a fantastic reputation.

How much oil does a International Harvester 1066 take?

Check out the International Harvester 1066 oil capacity and oil type in the engine specs section as it may vary across the engines. Keep in mind, that older models might have their oil capacity increased over time. You may compare between the early and late oil capacity.

Do tractors have VIN numbers?

Every tractor has a VIN number. The number is usually engraved below the driver’s seat. Tractor manufacturers put the number in different places on the tractor body.

What was the last year International Harvester made the 1066?

The International Harvester 1066 was an agricultural tractor model made from 1971 – 1976

How much horsepower is a International Harvester 1066?

The 1066 engine tested at 105.95 hp
79.0 kW drawbar and 125.68 hp
93.7 kW kW PTO horsepower.

How much does a International Harvester 1066 tractor weight?

Depending on the engine type, the International Harvester 1066 weight ranges from 12148 to 13345 pounds .

How much can a International Harvester 1066 Pull?

The max pulling capacity of the International Harvester 1066 tractors starts at 11,625 lbs
5273 kg but may be slightly higher depending on the trim.

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